Personalized Trombone Decorative Line Youth Long Sleeve T-Shirt. Trombone text with a decorative line sporting a music note is a fun gift design for musicians, students and teachers at back to school, birthdays, holidays and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)